| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 119 |
| Rear reflector on motorcycle missing |1.4.1| | 106 |
| Front Roller brake test indicates a binding brake |3.3.A1a| | 55 |
| Registration plate issues | 52 |
| Nearside Front shock absorber seal failed and leaking oil |2.3.3| | 46 |
| Rear Roller brake test indicates a binding brake |3.3.A1a| | 43 |
| Front Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 42 |
| Offside Front shock absorber seal failed and leaking oil |2.3.3| | 42 |
| Throttle operating incorrectly |6.2.1f| | 30 |
| Exhaust is leaking and excessively noisey |7.1.1b| | 29 |
| Drive chain excessively loose |6.2.1d| | 28 |
| Rear Rear reflector on motorcycle missing |1.4.1| | 27 |
| Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 25 |
| Nearside Handlebar handgrip not secure to handlebars. |2.1.1c| | 25 |
| Rear position lamp does not illuminate immediately when it is switched on |1.1.3a| | 22 |
| Front position lamp does not illuminate immediately when switched on |1.1.3a| | 21 |
| Horn not working |1.7.3a| | 20 |
| Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 20 |
| Rear Stop lamp does not illuminate immediately a brake applies |1.3.1a| | 19 |
| Nearside Front Front shock absorber seal failed and leaking oil |2.3.3| | 19 |
| Rear Brake disc|s| cracked |3.2.A1g| | 17 |
| Drive chain worn to excess |6.2.1e| | 17 |
| Front Floor brake test indicates a binding brake |3.3.C2c| | 17 |
| Rear Floor brake test indicates a binding brake |3.3.C2c| | 15 |
| Rear wheel bearings have excessive free play |2.4.A.2c| | 15 |
| Front Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 14 |
| Offside Front Front shock absorber seal failed and leaking oil |2.3.3| | 14 |
| Steering movement excessively `notchy` with the weight on the lower bearing |2.2.1a| | 13 |
| Headlamp aim beam image kick up to the offside |1.6| | 13 |
| Front shock absorber seal failed and leaking oil |2.3.3| | 12 |
| Roller brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.A2b| | 12 |
| Wheel alignment incorrect which adversely affects the handling |2.5.1| | 11 |
| Steering headbearing has excessive free play |2.2.2| | 11 |
| Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 11 |
| Front suspension has inadequate damping effect. |2.3.6c| | 11 |
| Offside Handlebar handgrip not secure to handlebars. |2.1.1c| | 11 |
| Front wheel bearings are excessively rough |2.3.5b| | 10 |
| Drive chain excessively tight |6.2.1d| | 10 |
| Front wheel bearings have excessive free play |2.3.5b| | 10 |
| Rear Drive chain sprocket worn to excess |6.2.1e| | 9 |
| Rear Roller brake test indicates a sticking brake |3.3.A1a| | 8 |
| Rear Drive chain excessively loose |6.2.1d| | 8 |
| Front Hydraulic brake control feels spongy |3.1.4a| | 8 |
| Wheel alignment incorrect which adversely affects the steering |2.5.1| | 8 |
| Front Front shock absorber seal failed and leaking oil |2.3.3| | 8 |
| Rear Rear wheel bearings have excessive free play |2.4.A.2c| | 7 |
| Front Brake disc|s| excessively worn |3.2.A1l| | 7 |
| Rear Brake caliper|s| insecure |3.2.A1j| | 7 |
| Centre Rear Rear reflector on motorcycle missing |1.4.1| | 7 |
| Front Roller brake test indicates a sticking brake |3.3.A1a| | 6 |
| Headlamp switch faulty |1.2.4| | 6 |
| Floor brake test The less effective brake control does not achieve an efficiency of 25%. |3.3.C1b| | 6 |
| Exhaust markings indicating not for road use or similar wording |7.1.4| | 6 |
| Exhaust excessively deteriorated |7.1.1a| | 6 |
| Rear Floor brake test indicates a sticking brake |3.3.C2c| | 6 |
| Exhaust noise is clearly in excess of that emitted by a similar motor bicycle fitted with a standard silencer in average condition |7.1.2| | 6 |
| Nearside Front Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Offside Front Brake disc|s| excessively worn |3.2.A1l| | 6 |
| Rear Wheel alignment incorrect which adversely affects the handling |2.5.1| | 5 |
| Headlamp at least one does not illuminate on main beam |1.2.2a|ii|| | 5 |
| Nearside Rear Direction indicators not working |1.5.1c| | 5 |
| Brake performance not tested |3.3| | 5 |
| Rear shock absorber has inadequate damping effect. |2.4.A.3b| | 5 |
| Rear Drive chain sprocket carrier worn to excess |6.2.1e| | 5 |
| Rear Stop lamp remains on when the brake is released |1.3.1e| | 5 |
| Steering movement excessively stiff with the weight on the lower bearing |2.2.1a| | 5 |
| Rear Brake locking device missing |3.2.A1e| | 5 |
| Nearside Rear Direction indicator not working |1.5.1c| | 5 |
| Front Front suspension has inadequate damping effect. |2.3.6c| | 5 |
| Nearside Front Brake disc|s| friction surface contaminated by oil or grease |3.2.A1k| | 5 |
| Offside Rear Direction indicators not working |1.5.1c| | 5 |
| Front Headlamp aim beam image kick up to the offside |1.6| | 4 |
| Nearside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 4 |
| Offside Front Direction indicator flashing more than 120 times per minute |1.5.1c| | 4 |
| Rear Roller brake test indicates excessive fluctuation of brake effort |3.3.A1d| | 4 |
| Front All position lamps do not illuminate immediately when switched on |1.1.3a| | 4 |
| Rear Position lamp not working (4.2.1 (a)) | 4 |
| Rear Brake disc|s| excessively worn |3.2.A1l| | 4 |
| Front Front position lamp does not illuminate immediately when switched on |1.1.3a| | 4 |
| Front Floor brake test indicates a sticking brake |3.3.C2c| | 4 |
| Exhaust mounting does not fully support the exhaust system |7.1.1.c| | 4 |
| Brake hose damaged | 4 |
| Front Headlamp at least one does not illuminate on dipped beam |1.2.2a|i|| | 4 |
| Front Front wheel bearings are excessively rough |2.3.5b| | 4 |
| Riders seat insecure |6.2.1a| | 4 |
| Steering movement excessively stiff with the wheel raised |2.2.1b| | 4 |
| An item not tested |Manual| | 4 |
| Direction indicators flashing more than 120 times per minute |1.5.1c| | 4 |
| Rear Brake component has restricted free movement and operation is likely to be impeded |3.2.A1h| | 4 |
| Rear reflector missing (4.8.2 (a) (ii)) | 4 |
| Front Steering movement excessively `notchy` with the wheel raised |2.2.1b| | 3 |
| Front Brake fluid reservoir fluid level dangerously low |3.2.B1d| | 3 |
| Front Brake lever is bent and the brake cannot be readily applied |3.1.3c| | 3 |
| Offside Steering control has Insufficient clearance at full lock affecting the riders grasp of handlebars |2.1.2b| | 3 |
| Nearside Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Horn not working |7.7 |a| |ii|| | 3 |
| Front Headlamp aim beam image kick-up is to the offside |1.6.1| | 3 |
| Rear Brake hose is likely to be fouled or trapped by moving parts |3.2.B2c| | 3 |
| Front suspension has excessive stiffness in the suspension movement. |2.3.6b| | 3 |
| Front Front mudguard insecure |2.3.7| | 3 |
| Chain guard insecure |6.2.1c| | 3 |
| Exhaust mounting missing |7.1.1c| | 3 |
| Front Wheel has an excessively distorted bead rim. |4.2.2| | 3 |
| Front wheel spindle securing nut|s| loose |2.3.5a| | 3 |
| Offside Front Footrest insecure |6.2.1a| | 3 |
| Front Horn not working |1.7.3a| | 3 |
| Front Plate brake test indicates a binding brake |3.3.B1a| | 3 |
| Headlamp insecure |1.2.3b| | 3 |
| Nearside Rear Direction indicator insecure |1.5.3b| | 3 |
| Rear Stop lamp does not emit a steady light |1.3.1b| | 3 |
| Rear Exhaust is leaking and excessively noisey |7.1.1b| | 3 |
| Front Brake indicates excessive fluctuation of brake effort (1.2.1 (e)) | 3 |
| Roller brake test No brake control achieves an efficiency of 30%. |3.3.A2a| | 3 |
| Offside Front Brake disc|s| cracked |3.2.A1g| | 3 |
| Nearside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Offside Rear Direction indicator flashing more than 120 times per minute |1.5.1c| | 3 |
| Rear Brake master cylinder fluid level dangerously low |3.2.B1d| | 3 |
| Dipswitch does not extinquish main beam/s, leaving at least 1 dipped beam headlamp |1.2.2b|i|| | 3 |
| Front Roller brake test indicates brake effort rise disproportional to brake lever or pedal effort |3.3.A1c| | 3 |
| Offside Rear Brake caliper|s| insecure |3.2.A1j| | 3 |
| Rear An item not tested |Manual| | 3 |
| Rear Footrest missing |6.2.1a| | 3 |
| Front Roller brake test indicates a severely juddering brake |3.3.A1b| | 3 |
| Rear wheel spindle securing nut locking device missing |2.4.A.2b| | 3 |
| Offside Rear Brake disc|s| cracked |3.2.A1g| | 3 |
| Drive chain sprocket carrier worn to excess |6.2.1e| | 3 |